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September 9,2005 NOA Project Number: E05039B L6.3 Boring Preparation and Presaturation One shallow and one deep soil boring were advanced on each parcel with a four inch hand augur on August 15 and August 22,2005. A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of water in the percolation test boring. Approximately 2 inches of"pea gravel' were placed in the bottom of the open soil boring,then the PVC pipe was installed on top of the gravel. "Pea Gravel' was then used to backfill in the annular space. Presaturation of the percolation test holes occurred on August 22,2005.The depth of water used to pre-soak was 12 inches above the bottom of the boring. L6.4 Condition of Borings After Presaturation L After the 24-hour soak period, the four presaturated holes were found to be intact and dry on August 23, 2005. 6.5 Percolation Test Procedure Percolation tests were conducted for the borings on August 23,2005 in accordance with the i requirements of the EHD. A percolation tests with a duration of four hours were performed for each hole. The last half an hour of each test was observed by Mr. David Van Dyne, Senior Registered Environmental Health Specialist,EHD. LMeasurement of the water level during the percolation test was from a fixed reference point on the PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All tabulated L values on the field data sheet (appendix) are in decimal feet. After water drop was observed, the holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the bottom level of the percolation test hole. The readings were taken every 30 minutes for a period of Lfour hours. 6.6 Percolation Test Forms and Results The completed percolation test form is included in the appendix of this report A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth;a L satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A deep percolation test is defined as being between 3.5 and 25 feet in depth; a satisfactory percolation rate for a deep test is 30 min/in or less. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each parcel to utilize a standard 8 "04